Overview
To impress a beautiful girl, Harold Kelp, the grandson of professor Julius Kelp, who created a potion to transform his personality, gets his hands on his grandfather's secret elixir and unleashes his destructive alter ego, Jack.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 22 | 39 | |
 | 82 | August 20, 2017 (91) | |
 | 44 | 60 | |
 | - | - | |
| - | - | |
 | 39 | 56 | |
 | 23 | 40 | |
 | 24 | 40 | |
 | 32 | 49 |